Non-Semisimple Topological Quantum Field Theories for 3-Manifolds with Corners
Non-Semisimple Topological Quantum Field Theories for 3-Manifolds with Corners

Author: Thomas Kerler

Publisher: Springer

Published: 2003-07-01

Total Pages: 381

ISBN-13: 3540446257

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This book presents the (to date) most general approach to combinatorial constructions of topological quantum field theories (TQFTs) in three dimensions. The authors describe extended TQFTs as double functors between two naturally defined double categories: one of topological nature, made of 3-manifolds with corners, the other of algebraic nature, made of linear categories, functors, vector spaces and maps. Atiyah's conventional notion of TQFTs as well as the notion of modular functor from axiomatic conformal field theory are unified in this concept. A large class of such extended modular catergory is constructed, assigning a double functor to every abelian modular category, which does not have to be semisimple.

Forward-Backward Stochastic Differential Equations and their Applications
Forward-Backward Stochastic Differential Equations and their Applications

Author: Jin Ma

Publisher: Springer

Published: 2007-04-24

Total Pages: 285

ISBN-13: 3540488316

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This volume is a survey/monograph on the recently developed theory of forward-backward stochastic differential equations (FBSDEs). Basic techniques such as the method of optimal control, the 'Four Step Scheme', and the method of continuation are presented in full. Related topics such as backward stochastic PDEs and many applications of FBSDEs are also discussed in detail. The volume is suitable for readers with basic knowledge of stochastic differential equations, and some exposure to the stochastic control theory and PDEs. It can be used for researchers and/or senior graduate students in the areas of probability, control theory, mathematical finance, and other related fields.

Sharp Real-Part Theorems
Sharp Real-Part Theorems

Author: Gershon Kresin

Publisher: Springer

Published: 2007-03-05

Total Pages: 153

ISBN-13: 3540695745

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This volume contains a coherent point of view on various sharp pointwise inequalities for analytic functions in a disk in terms of the real part of the function on the boundary circle or in the disk itself. Inequalities of this type are frequently used in the theory of entire functions and in the analytic number theory.

Beyond Partial Differential Equations
Beyond Partial Differential Equations

Author: Horst Reinhard Beyer

Publisher: Springer

Published: 2007-04-10

Total Pages: 291

ISBN-13: 3540711295

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This book introduces the treatment of linear and nonlinear (quasi-linear) abstract evolution equations by methods from the theory of strongly continuous semigroups. The theoretical part is accessible to graduate students with basic knowledge in functional analysis, with only some examples requiring more specialized knowledge from the spectral theory of linear, self-adjoint operators in Hilbert spaces. Emphasis is placed on equations of the hyperbolic type which are less often treated in the literature.

Stable Approximate Evaluation of Unbounded Operators
Stable Approximate Evaluation of Unbounded Operators

Author: C. W. Groetsch

Publisher: Springer Science & Business Media

Published: 2007

Total Pages: 134

ISBN-13: 3540399429

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Spectral theory of bounded linear operators teams up with von Neumann’s theory of unbounded operators in this monograph to provide a general framework for the study of stable methods for the evaluation of unbounded operators. An introductory chapter provides numerous illustrations of unbounded linear operators that arise in various inverse problems of mathematical physics. Before the general theory of stabilization methods is developed, an extensive exposition of the necessary background material from the theory of operators on Hilbert space is provided. Several specific stabilization methods are studied in detail, with particular attention to the Tikhonov-Morozov method and its iterated version.

Polynomial Representations of GL_n
Polynomial Representations of GL_n

Author: James A. Green

Publisher: Springer Science & Business Media

Published: 2006-11-30

Total Pages: 167

ISBN-13: 3540469443

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The new corrected and expanded edition adds a special appendix on Schensted Correspondence and Littelmann Paths. This appendix can be read independently of the rest of the volume and is an account of the Littelmann path model for the case gln. The appendix also offers complete proofs of classical theorems of Schensted and Knuth.

Concentration Inequalities and Model Selection
Concentration Inequalities and Model Selection

Author: Pascal Massart

Publisher: Springer

Published: 2007-04-26

Total Pages: 346

ISBN-13: 3540485031

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Concentration inequalities have been recognized as fundamental tools in several domains such as geometry of Banach spaces or random combinatorics. They also turn to be essential tools to develop a non asymptotic theory in statistics. This volume provides an overview of a non asymptotic theory for model selection. It also discusses some selected applications to variable selection, change points detection and statistical learning.